[Bug rtl-optimization/48141] [4.4/4.5/4.6 Regression] DSE compile time hog

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48141

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-26 
09:19:39 UTC ---
Author: jakub
Date: Sat Mar 26 09:19:36 2011
New Revision: 171545

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171545
Log:
    Backport from mainline
    2011-03-17  Jakub Jelinek  <ja...@redhat.com>

    PR rtl-optimization/48141
    * dse.c (record_store): If no positions are needed in an insn
    that cannot be deleted, at least unchain it from active_local_stores.

    * gcc.dg/pr48141.c: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/pr48141.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/dse.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog